@article{chen_guo_weng_wang_zhou_2024, title={Expanding the family of plane-symmetric 6R deployable polygon mechanisms by systematically exploring the layout of R-joint axes}, volume={202}, ISSN={["1873-3999"]}, DOI={10.1016/j.mechmachtheory.2024.105768}, journal={MECHANISM AND MACHINE THEORY}, author={Chen, Hao and Guo, Weizhong and Weng, Zhenghao and Wang, Mingxuan and Zhou, Caizhi}, year={2024}, month={Nov} }
 @article{li_zhou_yin_2024, title={Geometric mechanics of kiri-origami-based bifurcated mechanical metamaterials}, volume={382}, ISSN={["1471-2962"]}, DOI={10.1098/rsta.2024.0010}, abstractNote={We explore a new design strategy of leveraging kinematic bifurcation in creating origami/kirigami-based three-dimensional (3D) hierarchical, reconfigurable, mechanical metamaterials with tunable mechanical responses. We start from constructing three basic, thick, panel-based structural units composed of 4, 6 and 8 rigidly rotatable cubes in close-looped connections. They are modelled, respectively, as 4R, 6R and 8R (R stands for revolute joint) spatial looped kinematic mechanisms, and are used to create a library of reconfigurable hierarchical building blocks that exhibit kinematic bifurcations. We analytically investigate their reconfiguration kinematics and predict the occurrence and locations of kinematic bifurcations through a trial-correction modelling method. These building blocks are tessellated in 3D to create various 3D bifurcated hierarchical mechanical metamaterials that preserve the kinematic bifurcations in their building blocks to reconfigure into different 3D architectures. By combining the kinematics and considering the elastic torsional energy stored in the folds, we develop the geometric mechanics to predict their tunable anisotropic Poisson’s ratios and stiffnesses. We find that kinematic bifurcation can significantly effect mechanical responses, including changing the sign of Poisson’s ratios from negative to positive beyond bifurcation, tuning the anisotropy, and overcoming the polarity of structural stiffness and enhancing the number of deformation paths with more reconfigured shapes. This article is part of the theme issue ‘Origami/Kirigami-inspired structures: from fundamentals to applications’.}, number={2283}, journal={PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES}, author={Li, Yanbin and Zhou, Caizhi and Yin, Jie}, year={2024}, month={Oct} }
 @article{chen_guo_zhou_weng_wang_2024, title={Synthesis and cross-section design of a new family of single-loop 7R deployable polygon mechanisms}, volume={198}, ISSN={["1873-3999"]}, DOI={10.1016/j.mechmachtheory.2024.105653}, abstractNote={In this paper, two design methods for different stages in the development of a single-degree-of-freedom (DOF) single-loop 7R deployable polygon mechanism (DGM) without overconstraints are presented, encompassing schematic synthesis and cross-section design methods for 7R DGMs. Firstly, two classes of revolute pair axes in DGMs are reviewed, detailing their value ranges and parameter definitions. A schematic synthesis method for single-DOF single-loop 7R DGMs is then proposed, followed by the development of a cross-section design method to enable desired cross-sections in these mechanisms. By applying these methods, three types of 7R DGMs were created and prototyped, with their folding sequences demonstrated and input singularity analysis conducted. Through the utilization of the presented design method, all single-DOF single-loop 7R DGMs can be designed. This work introduces a new family of DGMs and addresses the gap in the domain of general spatial single-DOF single-loop DGMs that are not overconstrained. It demonstrates the feasibility of designs whose expanded shapes form general planar polygons. This effort expands the variety and quantity of DGMs, paving the way for more innovative deployable network mechanisms.}, journal={MECHANISM AND MACHINE THEORY}, author={Chen, Hao and Guo, Weizhong and Zhou, Caizhi and Weng, Zhenghao and Wang, Mingxuan}, year={2024}, month={Aug} }